Tanna is a city in Thuringia, in the district of Saale-Orla-Kreis. It is located about 10 km south of Schleiz. Tanna was founded in 1495.HistoryWithin the German Empire (1871-1918), Tanna was part of the Principality of Reuss-Gera.Population growthHistorical population (from 1994 December 31): Statistics since 1994: Thüringer Landesamt für Statistik